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sensors Mode-S transponder

C81A5A

ICAO 24-bit transponder address · allocated to New Zealand

Currently assigned to ZK-NEQ · DE HAVILLAND DHC-8-300 Dash 8

Hex
C81A5A
Octal
62015132
Decimal
13,113,946
Country
NZ
Tail
ZK-NEQ
Type
DH8C
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
502
Distinct callsigns
20
Country
NZ
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S C81A5A.

Country allocation

The ICAO 24-bit address C81A5A falls within the block assigned to New Zealand (NZ) by ICAO Annex 10, Volume III. Every aircraft registered in New Zealand receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 20 distinct

Callsign Airline Flights Last seen
ANZ763L - 10 2026-06-23
ANZ305L - 9 2026-07-21
ANZ024L Air New Zealand 9 2026-07-26
ANZ019L Air New Zealand 9 2026-07-26
ANZ854L - 8 2026-07-12
ANZ275L Air New Zealand 8 2026-07-26
ANZ272L Air New Zealand 8 2026-07-26
ANZ837L - 7 2026-07-12
ANZ832L - 7 2026-07-12
ANZ730L - 7 2026-07-08
ANZ729L - 7 2026-07-08
ANZ726L - 7 2026-07-20
ANZ725L Air New Zealand 7 2026-07-20
ANZ230L Air New Zealand 7 2026-07-19
ANZ885L - 6 2026-07-17
ANZ884L Air New Zealand 6 2026-07-17
ANZ524L - 6 2026-07-17
ANZ336L Air New Zealand 6 2026-07-03
ANZ311L - 6 2026-07-13
ANZ235L - 6 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ANZ128L TRG → AKL Jul 26, 22:05 UTCJul 26, 22:30 UTC25m
2026-07-26 ANZ129L AKL → TRG Jul 26, 20:45 UTCJul 26, 21:10 UTC25m
2026-07-26 ANZ275L KKE → AKL Jul 26, 18:05 UTCJul 26, 18:35 UTC30m
2026-07-26 ANZ272L AKL → KKE Jul 26, 08:00 UTCJul 26, 08:20 UTC20m
2026-07-26 ANZ024L NPE → AKL Jul 26, 06:10 UTCJul 26, 07:05 UTC56m
2026-07-26 ANZ019L AKL → NPE Jul 26, 04:35 UTCJul 26, 05:25 UTC50m
2026-07-24 ANZ275L KKE → AKL Jul 24, 18:10 UTCJul 24, 18:35 UTC25m
2026-07-24 ANZ272L AKL → KKE Jul 24, 08:05 UTCJul 24, 08:30 UTC25m
2026-07-24 ANZ024L NPE → AKL Jul 24, 06:00 UTCJul 24, 07:00 UTC1h 0m
2026-07-24 ANZ019L AKL → NPE Jul 24, 04:30 UTCJul 24, 05:15 UTC45m
2026-07-24 ANZ174L GIS → AKL Jul 24, 02:35 UTCJul 24, 03:25 UTC50m
2026-07-24 ANZ169L AKL → GIS Jul 24, 00:35 UTCJul 24, 01:15 UTC40m
2026-07-23 ANZ060L NSN → AKL Jul 23, 20:45 UTCJul 23, 22:05 UTC1h 20m
2026-07-23 ANZ063L AKL → NSN Jul 23, 18:45 UTCJul 23, 19:55 UTC1h 10m
2026-07-23 ANZ024L NPE → AKL Jul 23, 06:35 UTCJul 23, 07:25 UTC50m
2026-07-23 ANZ019L AKL → NPE Jul 23, 05:05 UTCJul 23, 05:50 UTC45m
2026-07-23 ANZ267L KKE → AKL Jul 23, 03:55 UTCJul 23, 04:20 UTC25m
2026-07-23 ANZ267L KKE → AKL Jul 23, 01:20 UTCJul 23, 02:30 UTC1h 10m
2026-07-22 ANZ960L CHC → AKL Jul 22, 22:20 UTCJul 22, 23:45 UTC1h 25m
2026-07-22 ANZ064L NSN → AKL Jul 22, 18:40 UTCJul 22, 20:50 UTC2h 10m
2026-07-22 ANZ095L AKL → TUO Jul 22, 05:05 UTCJul 22, 05:25 UTC20m
2026-07-22 ANZ076L NSN → AKL Jul 22, 02:55 UTCJul 22, 04:05 UTC1h 10m
2026-07-22 ANZ323L WLG → NSN Jul 22, 00:25 UTCJul 22, 00:50 UTC25m
2026-07-21 ANZ306L NSN → WLG Jul 21, 23:05 UTCJul 21, 23:30 UTC25m
2026-07-21 ANZ305L - Jul 21, 21:40 UTCJul 21, 22:05 UTC25m
2026-07-21 ANZ190L ASG → WLG Jul 21, 19:15 UTCJul 21, 20:05 UTC50m
2026-07-21 ANZ199L - Jul 21, 06:00 UTCJul 21, 07:05 UTC1h 5m
2026-07-21 ANZ192L - Jul 21, 00:15 UTCJul 21, 01:00 UTC45m
2026-07-20 ANZ193L - Jul 20, 22:10 UTCJul 20, 23:15 UTC1h 5m
2026-07-20 ANZ726L - Jul 20, 21:00 UTCJul 20, 21:20 UTC20m
2026-07-20 ANZ725L WLG → BHE Jul 20, 20:00 UTCJul 20, 20:20 UTC20m
2026-07-20 ANZ300L - Jul 20, 18:55 UTCJul 20, 19:20 UTC25m
2026-07-20 ANZ317L - Jul 20, 04:50 UTCJul 20, 05:15 UTC25m
2026-07-20 ANZ259L TRG → WLG Jul 20, 01:05 UTCJul 20, 02:05 UTC1h 0m
2026-07-19 ANZ260L WLG → TRG Jul 19, 23:10 UTCJul 20, 00:15 UTC1h 5m
2026-07-19 ANZ231L - Jul 19, 20:45 UTCJul 19, 21:35 UTC50m
2026-07-19 ANZ238L - Jul 19, 19:00 UTCJul 19, 19:55 UTC55m
2026-07-19 ANZ235L - Jul 19, 06:10 UTCJul 19, 07:10 UTC1h 0m
2026-07-19 ANZ230L WLG → ROT Jul 19, 04:25 UTCJul 19, 05:20 UTC55m
2026-07-19 ANZ233L ROT → WLG Jul 19, 00:00 UTCJul 19, 01:00 UTC1h 0m
2026-07-18 ANZ234L WLG → ROT Jul 18, 22:20 UTCJul 18, 23:10 UTC50m
2026-07-18 ANZ261L - Jul 18, 03:35 UTCJul 18, 04:45 UTC1h 10m
2026-07-18 - - Jul 18, 01:54 UTCJul 18, 02:50 UTC56m
2026-07-17 ANZ885L NPE → WLG Jul 17, 22:55 UTCJul 17, 23:39 UTC45m
2026-07-17 ANZ884L WLG → NPE Jul 17, 21:25 UTCJul 17, 22:10 UTC45m
2026-07-17 ANZ736L - Jul 17, 06:00 UTCJul 17, 07:00 UTC1h 0m
2026-07-17 ANZ524L - Jul 17, 04:39 UTCJul 17, 05:10 UTC30m
2026-07-16 ANZ067L - Jul 16, 23:15 UTCJul 17, 00:20 UTC1h 5m
2026-07-16 ANZ221L - Jul 16, 22:00 UTCJul 16, 22:25 UTC25m
2026-07-16 ANZ220L - Jul 16, 21:00 UTCJul 16, 21:25 UTC25m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the ZK-NEQ page for operator, model, and routing details .

Mode-S C81A5A frequently asked

What is Mode-S code C81A5A?
C81A5A is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-NEQ.
Where is Mode-S C81A5A registered?
Mode-S code C81A5A is allocated to New Zealand (NZ). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is C81A5A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C81A5A, octal 62015132, decimal 13,113,946.
What flights does C81A5A operate?
Mode-S C81A5A has broadcast 20 distinct callsigns, including ANZ763L, ANZ305L, ANZ024L, ANZ019L, ANZ854L.